DIN EN 60079-29-4
; VDE 0400-40:2011-02
Explosive atmospheres - Part 29-4: Gas detectors - Performance requirements of open path detectors for flammable gases (IEC 60079-29-4:2009, modified + Cor. :2010); German version EN 60079-29-4:2010
Explosionsfähige Atmosphäre - Teil 29-4: Gasmessgeräte - Anforderungen an das Betriebsverhalten von Geräten mit offener Messstrecke für die Messung brennbarer Gase (IEC 60079-29-4:2009, modifiziert + Cor. :2010); Deutsche Fassung EN 60079-29-4:2010
Overview
The responsible Committee is Subcommittee UK 966.1 "Mess- und Warngeräte für gefährliche Gase" ("Measurement and warning devices for dangerous gases") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE. This standard specifies performance requirements for the detection and measuring of flammable gases or vapours in ambient air by measuring the spectral absorption by the gases or vapours. The measurement is carried out over extended optical paths, ranging typically from one metre to a few kilometres. Such equipment measures the integral concentration of the absorbing gas over the optical path in units such as LFL metre for flammable gases.
